Frost warning issued for Chicago area in A.M.

Vegetation and outdoor plants should be covered Wednesday morning when a frost advisory will be in effect in the Chicago area, the National Weather Service said.

The advisory will be in effect from 4 a.m. to 8 a.m. in counties including Cook, DuPage, Lake, McHenry, Kane, Dekalb, Kendall and Will, the weather service said.

Temperatures will drop into the lower middle 30s over portions of northern Illinois during the early morning hours. Areas along Lake Michigan and near downtown Chicago should remain warmer and catch a break from the frost.